Terry K Tham

US Patent:

20020061107, May 23, 2002

Filed:

Sep 6, 2001

Appl. No.:

09/948203

Inventors:

Terry Tham - San Jose CA, US
Errol Lai - Mountain View CA, US

International Classification:

H04L009/00

US Classification:

380/259000

Abstract:

Methods and apparatus are provided for implementing a cryptography engine for cryptography processing. A variety of techniques are described. A cryptography engine such as a DES engine running at a clock frequency higher than that of surrounding logic can be synchronized with the surrounding logic using a frequency synchronizer. Sbox logic output can be more efficiently determined by intelligently arranging Sbox input.

US Patent:

20050063538, Mar 24, 2005

Filed:

Oct 29, 2004

Appl. No.:

10/977317

Inventors:

Terry Tham - San Jose CA, US
Errol Lai - Mountain View CA, US

International Classification:

H04K001/00

US Classification:

380028000

Abstract:

Methods and apparatus are provided for implementing a cryptography engine for cryptography processing. A variety of techniques are described. A cryptography engine such as a DES engine running at a clock frequency higher than that of surrounding logic can be synchronized with the surrounding logic using a frequency synchronizer. Sbox logic output can be more efficiently determined by intelligently arranging Sbox input.

US Patent:

20070055879, Mar 8, 2007

Filed:

Aug 16, 2005

Appl. No.:

11/205851

Inventors:

Jianjun Luo - Cupertino CA, US
David Chin - Los Altos CA, US
Terry Tham - Cupertino CA, US

International Classification:

H04L 9/00

US Classification:

713171000

Abstract:

A method and apparatus for high performance public key operations which allows key sizes longer than 4K bit, without substantial degradation in performance. The present invention provides variations of modular reduction methods based on standard Barrett algorithm (modified Barrett algorithm) to accommodate RSA, DSA and other public key operation. The invention includes a unique microcode architecture for supporting highly pipelined long integer (usually several thousand bits) operations without condition checking and branching overhead and an optimized data-independent pipelined scheduling for major public key operations like, RSA, DSA, DH, and the like.